Solution :a. i. `LAH//EtOH` reduces both `(RCOCL)` and ester (here cyclic ester) to alcohols (ii) Lindlar's catalyst (`H_(2)` + POISONED Pd) reduces only `(RCOCl)` to aldehydes not esters (iii) `DIBAL-H` reduces ester to aldehyde and ALCOHOL not `(RCOCl)` GROUP.